Mophie’s Juice Packs are unqualified success stories. After debuting the first Juice Pack in late 2007, Mophie became synonymous with “iPhone battery cases,” and enjoyed years of popularity despite increasing competition. But the company’s USB battery packs aren’t as well-known. Ranging from minimalist to ruggedized, Mophie’s Powerstations range from 3,000mAh to 12,000mAh in capacity, and carry hefty $80 to $150 MSRPs. Regardless of whether they’re judged by features or battery performance for the dollar, they’re hard to pick over rivals, since you can now get a high-quality 25,600mAh battery for the same price as a 3,000mAh PowerStation.

Based upon last year’s iPhone 5/5s-specific Space Packs, the brand new Spacestation is Mophie’s shot at differentiating its USB batteries from the masses. Offered in 32GB ($150), 64GB ($200) and 128GB ($300) capacities, Spacestation combines an app-managed USB flash drive with a 6,000mAh battery, which promises “3X extra battery” life. Realistically, that’s enough power for a full recharge of the original iPad mini or three recharges of older iPhones. But since 6,000mAh batteries are getting cheaper every week, Spacestation’s appeal is mostly in its ability to at least double the number of videos, music, photos, and documents that can be accessed by your iOS device on the road…

Mophie’s batteries differ considerably between the devices. The iPhone 6 Space Pack has a 3,300mAh battery, which is said to provide a 100% recharge of the device, while the iPhone 6 Plus version has a smaller 2,600mAh battery that Mophie says will deliver a 50% recharge. An 8,000mAh battery in the more expensive iPad mini case promises a 100% recharge, and a 6,000mAh battery in SpaceStation is claimed to offer “3X extra battery” for unspecified devices — certainly smaller phones, rather than the iPhones and iPads supported by the other models.